<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
    <link rel="stylesheet" href="./index.css" />
  </head>

  <body>
    <section id="wrap">
      <h2 class="title">百度音乐榜单</h2>
      <ul id="list">
        <li>
          <input type="checkbox" checked="false" />
          <span>第一条信息</span>
          <a href="javascript:;" class="collect">收藏</a>
          <a href="javascript:;" class="cancelCollect">取消收藏</a>
          <a href="javascript:;" class="remove">删除</a>
        </li>
      </ul>
      <footer class="footer">
        <label><input type="checkbox" id="checkAll" />全选/全不选</label>
        <a href="javascript:;" id="removeAll">删除</a>
        <input type="text" id="newInfo" placeholder="歌曲名 - 歌手名" />
        <a href="javascript:;" id="add">添加歌曲</a>
      </footer>
      <!-- <button>调试 检测数据</button> -->
    </section>
    <script>
      document.querySelector("input").checked = false;
      // document.querySelector("input").setAttribute("checked",true);
      var data = [
        {
          id: 0,
          title: "残酷月光 - 费启鸣",
          checked: true,
          collect: true,
        },
        {
          id: 1,
          title: "兄弟 - 艾热",
          checked: false,
          collect: false,
        },
        {
          id: 2,
          title: "毕生 - 夏增祥",
          checked: false,
          collect: true,
        },
        {
          id: 3,
          title: "公子向北去 - 李春花",
          checked: false,
          collect: false,
        },
        {
          id: 4,
          title: "战场 - 沙漠五子",
          checked: true,
          collect: false, //是否收藏 true 收藏 false 没有收藏
        },
      ];
      rendomdata(data);
      function rendomdata(data) {
        var ulEle = document.querySelector("#list");
        ulEle.innerHTML = "";
        data.forEach(function (item) {
          var liEle = document.createElement("li");
          var str = `<input type="checkbox" class="checkone"/>`;
          if (item.checked == true) {
            str = `<input type="checkbox" checked="checked" class="checkone"`;
          }
          liEle.innerHTML = `${str}
              <span>${item.title}</span>
              ${
                item.collect
                  ? '<a href="javascript:;" class="cancelCollect">取消收藏</a>'
                  : '<a href="javascript:;" class="collect">收藏</a>'
              }
              <a href="javascript:;" class="remove">删除</a>`;
          ulEle.appendChild(liEle);
        });
        // checkOne(data);
        myadd();
        // document.querySelector("button").onclick = function () {
        //   console.log(data);
        // }; //data数据检测点
      }
      //全选/全不选
      var checkAll = document.querySelector("#checkAll");
      checkAll.onclick = function () {
        data.forEach(function (item, i) {
          data[i].checked = checkAll.checked;
        });
        rendomdata(data);
      };
      //删除选中
      var deleteAll = document.querySelector("#removeAll");
      deleteAll.onclick = function () {
        data = data.filter((item) => item.checked == false);
        data.length == 0
          ? (checkAll.checked = false)
          : (checkAll.checked = true);
        rendomdata(data);
      };
      //添加
      var addBtn = document.querySelector("#add");
      addBtn.onclick = function () {
        var nameEle = document.querySelector("#newInfo");
        var newid = parseInt(data[data.length - 1].id) + 1;
        var newobj = {
          id: newid,
          title: `${nameEle.value}`,
          checked: false,
          collect: false,
        };
        data.push(newobj);
        rendomdata(data);
      };
      //和添加事件相关的 重新渲染之后需要绑定关系的
      function myadd() {
        var lis = document.querySelectorAll("#list li");
        lis.forEach(function (item, i) {
          //相当于 item.onclick=function(){}
          item.addEventListener("click", function (e) {
            var e = e || window.e;
            var target = e.target || e.srcElement;
            //收藏取消收藏
            if (target.className == "collect") {
              data[i].collect = true;
              rendomdata(data);
            }
            if (target.className == "cancelCollect") {
              data[i].collect = false;
              rendomdata(data);
            }
            //单选
            if (target.className == "checkone") {
              data[i].checked = target.checked;
              checkAll.checked = data.every((item) => item.checked);
              rendomdata(data);
            }
            //删除一个
            if (target.className == "remove") {
              data.splice(i, 1);
              data.length == 0
                ? (checkAll.checked = false)
                : (checkAll.checked = true);
              rendomdata(data);
            }
          });
        });
      }
    </script>
  </body>
</html>
